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modifier.regex_replace.php 1.6KB

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  1. <?php
  2. /**
  3. * Smarty plugin
  4. *
  5. * @package Smarty
  6. * @subpackage PluginsModifier
  7. */
  8. /**
  9. * Smarty regex_replace modifier plugin
  10. * Type: modifier<br>
  11. * Name: regex_replace<br>
  12. * Purpose: regular expression search/replace
  13. *
  14. * @link http://smarty.php.net/manual/en/language.modifier.regex.replace.php
  15. * regex_replace (Smarty online manual)
  16. * @author Monte Ohrt <monte at ohrt dot com>
  17. *
  18. * @param string $string input string
  19. * @param string|array $search regular expression(s) to search for
  20. * @param string|array $replace string(s) that should be replaced
  21. * @param int $limit the maximum number of replacements
  22. *
  23. * @return string
  24. */
  25. function smarty_modifier_regex_replace($string, $search, $replace, $limit = -1)
  26. {
  27. if (is_array($search)) {
  28. foreach ($search as $idx => $s) {
  29. $search[$idx] = _smarty_regex_replace_check($s);
  30. }
  31. } else {
  32. $search = _smarty_regex_replace_check($search);
  33. }
  34. return preg_replace($search, $replace, $string, $limit);
  35. }
  36. /**
  37. * @param string $search string(s) that should be replaced
  38. *
  39. * @return string
  40. * @ignore
  41. */
  42. function _smarty_regex_replace_check($search)
  43. {
  44. // null-byte injection detection
  45. // anything behind the first null-byte is ignored
  46. if (($pos = strpos($search, "\0")) !== false) {
  47. $search = substr($search, 0, $pos);
  48. }
  49. // remove eval-modifier from $search
  50. if (preg_match('!([a-zA-Z\s]+)$!s', $search, $match) && (strpos($match[1], 'e') !== false)) {
  51. $search = substr($search, 0, - strlen($match[1])) . preg_replace('![e\s]+!', '', $match[1]);
  52. }
  53. return $search;
  54. }